<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Bootstrap 实例 - 输入框组中分割的下拉菜单按钮</title>
  <link rel="stylesheet" href="../libs/bootstrap/3.3.7/css/bootstrap.min.css">
  <script src="../libs/jquery/2.1.1/jquery.min.js"></script>
  <script src="../libs/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<style>
  .vertical-align-content {
    background: green;
    height: 100%;
    width: 50%;
    position: absolute;
    right: 0;
    top: 0;
    /* Uncomment next line to get horizontal align also */
    /* justify-content:center; */
  }

</style>

<div class="container">
  <div class="row" style="display: table;">
    <div class="col-sm-6">
      a1sss<br/>
      a1sss<br/>
      a1sss<br/>
      a1sss<br/>
      a1sss<br/>
      a1sss<br/>
      a1sss<br/>
      a1sss<br/>
      a1sss<br/>
      a1sss<br/>
      a1sss<br/>
      a1sss<br/>
      a1sss<br/>
    </div>
    <div class="vertical-align-content">
      <div>Hodor!</div>
    </div>
  </div>

</div>
</body>
</html>